Combined control for radio receivers



Aug. 5, 1952 P. LEBRETON 2,605,643

COMBINED CONTROL FOR RADIO RECEIVERS Filed April 10, 1951 Invenzar Pierre Lebre 7 0? Patented Aug.

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LREGEIVEBS? Pierre LebretonJaris'a Application April 10, warsennmi; aeo'g-rs'i InFranceAprilJ 1950 'f 3 Claims. (01. 174519;?) l

1 This-invention relates to the means used for controllingrthe operation ofi ra'dio-rec'ei'vers in general and more particul-arlygto a novel arrangement whereby two control mechanisms of aaradioereceiver can be actuated simultaneously withoutresorting to any elaborate construction.

It is known that, as a rule, in every radio-receiver there are a plurality of wavebands and a continuously-variable element consisting of a capacitor or self-induction by means of which the precise wavelength ofthe desired broadcasting station can be selected in each band.

Thus, the user is generally confronted with the handling of two control buttons, the one for selecting the desired waveband, and the other for adjusting the variable element to the exact wavelength.

One drawback offered by these separate controls is that the user has to actuate two buttons separately, and another is that the external aspect of the receiver is unduly complicated by this conventional arrangement.

Of course, various devices have been devised for operatively connecting both controls, but their common drawback is their extreme intricacy.

It is the chief object of the present invention .to provide a novel device permitting the combination into a single control button of both controls as specified hereinabove or, more generally, the control of the member which produces the continuous variation of the wavelength, and that of another member adapted to change the waveband or, if preferred, the tone control, etc.

In order to afford a clearer understanding of the invention the latter will be described hereinafter with reference to the afiixed drawing illustrating diagrammatically by way of example a practical embodiment of the combined control for radio-receiver.

A lever l is pivotally mounted at one end on a fixed pivot pin 2 and formed with a slide 3 engaged by a pin 23 fixed on one end of a crank 4 the opposite end of which is fast with a shaft 5. This shaft is rotatably mounted in a fixed bearing. By displacing the lever I in the direction indicated by the arrow F or in the opposite direction the shaft 5 can be rotatedthrough a certain angle through the medium of the crank 4 having its pin 23 slidably mounted in the slide 3. The shaft 5 may be used for rotatably driving the waveband changing device or member or any other desired device.

Besides, the lever l is formed with or carries in the vicinity of its centre a pair of bearings 6. :i which a s aft. 81-1srot -tabla am un e A oov pu ley 9 is-keyed s. sha t-end therefore driven for rotation therebyinythe bearingsfi, i. Qntghe otherhand atw' g;rooye pulley l li -is mounted for .loose rotation on, ha

The shaftthroughwhichjthe memberfadaeiaed to effect the continuous variation innwavqlength has keyed thereon a drum ll formed withv; peg ripheral groove engaged by a wire i2. One end of wire I2 is anchored to the drum at 13. Wire [2 is passed over one portion of the drum periphery, over'pulleys l4, l5, It, in one groove of pulley it, over pulley 11; then the wire is wound a few turns round the control pulley 9, passed over pulley l8, in the other groove ofpulley l0 and its other end is finally anchored through the intermediary of a tension spring I9 to the drum II.

It will be noted that pulleys mounted for loose rotation on on a cross-member 20 fixed l1 and it! are both small pins secured with the level I.

It is obvious that by rotating the shaft 8 bymeans of a control button the drum and therefore the variable device will be rotatably driven.

A slider 2! fast with the wire is adapted to move toand fro along a guide bar 22 and to be fitted with an index of any desired type.

With the control described the user, by gripping the lever through its shaft 8 and pivotally moving it about its fixed pin 2, may select the desired waveband of the receiver, and by rotating the shaft 8 about its axis, the user may also control the member which provides the continuous wavelength variation.

A control button 24 may be fitted to the outer end of shaft 8 and act as a means for gripping the shaft and applying thereto either an angular displacement in the plane of the figure or a rotational movement in either directions, both operations occurring either in succession and, if desired, simultaneously without releasing the butten or actuating another control.

Of course, the drawing is merely a diagrammatical example for explaining the construction and operation of the combined control. It will be understood however that the lever may be displaced angularly in a plane other than that in which the drum H and pulleys ll, l4, l5, l6 rotate, without interferring with the operation of the device.

Similarly, various modifications may be brought to the arrangement of the various guide pulleys,

according to the type of receiver to which this to pulleys l7 and I8 may be modified to suit any constructional requirements. Of course, these and other modifications may be made without departing from the spirit and scope of the invention.

What I claim is:

1. Combined control for switching the tuning inductances and actuating variable condenser of a radio'receiver consisting of a lever fulcrumed at one end about a pivot pin, a longitudinal slot formed in said lever, another lever fulcrumed at one end about another pivot pin and formedat its free end with a crankpin slidably engaged in i said slot, said other pivot pin being operatively connected with the tuning inductances of the a spindle rotatably mounted in said bearing means, a control button arranged for rotating said spindle and simultaneously move said first lever angularly about its fulcrum, a grooved pulley keyed on said spind1e,-tWin-grooved pulley loosely mounted on the pivot pin of saidfirst lever, a variable condenser control drum and a motiontransmitting wire having both ends anchored to said -drum, a plurality of intermediate grooved pulleys, said wire being wound round said pulley, twin-grooved pulley and intermediate grooved pulleys.

15 radio receiver, bearing means on said slotted lever,

2. Combined control for radio receiver according to claim 1, comprising a slider fixed to said wire, an index on said slider, a rectilinear dial cooperating with said index, and two intermediate pulleys disposed at either end of said dial and round which said wire is passed.

3. Combined control for radio receiver according to claim 1, comprising a pair of loose pulleys mounted on said first lever oneither side of said grooved pulley keyed on said spindle, said wire passing over said loose pulleys before and after forming a few turns round said grooved pulley on said spindle.

PIERRE LEBRETON.

4 REFERENCES CITED Thefollowing references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,024,941 Lambert Apr. 30, 1912 1,297,999 Bryant Mar. 25, 1919 2,026,220 Denver Dec. 31, 1935 2,257,852 Nicol Oct. 7, 1941 2,460,374 Walls Feb. 1, 1949 

